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First, please forgive me the correction, but the Jurassic was not an era, but a geologic period of the Mesozoic era.
The Early Jurassic suffered a major extinction in the Triassic- Jurassic boundary.
Many archosaur species went extinct, as well as most of amphibia (except small size specimen). In the sea, all conodonts disappeared from fossil register.
Although dinosaurs, pterosaurs and ichthyosaurs were already present during the Triassic, this extintion gave the way to the reptilian gigantism of the Jurassic and the Cretaceous periods, along with bony fish gigantism, such as the largest know fish, the Leedsichthys.
The Jurassic was not a very peaceful period; besides the above major extintion, there were, at least, two other less serious - but nevertheles significative - extintions.
The supercontinent Pangea, the last supercontinent in the geologic history of our planet, began to broke apart, with intense vulcanism and earthquakes.
Earthquakes, even with magnitude 9 or above in the Richter scale, were not as dangerous as today, because there were no buildings, and they could cause regional landslides or, in the worst scenario, non-global topographic alterations.
So, during the Toarcian stage extintion, the sea fauna was hit more severely than the terrestrial fauna, with the total extintion of Ammonites, a long living cephalopod since the Devonian.
The Tithonian extintion was less severe, but the Atlantic Ocean was beeing formed with the tectonic plates mouvement and vulcanism, and the waters of the new ocean became anoxic, with the loss of marine biodversity.
About the flora in the Jurassic, it was dominated by conifers and, in a less extend, the gymnosperms. So, about the flora, no severe extintion occured.
Coralline algae, very important to coral reefs ecology, appeared for the first time.
Ferns, of course, kept abundant but the advent of flowers had to wait for the Cretaceous...
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What evolved during the Jurassic or Cretaceous periods?
During the Jurassic and Cretaceous periods, dinosaurs continued to evolve and diversify, with the rise of giants like sauropods and theropods. Flight also evolved further in Pterosaurs and early birds, developing more specialized adaptations. Additionally, flowering plants became more widespread, leading to the evolution of new types of insects and other animals that fed on them.
Was Pangaea around in the Jurassic period?
Yes, Pangaea began to break apart during the Jurassic period, around 180 million years ago. This breakup eventually led to the formation of the continents as we know them today.
What dangerous dinosaurs were there in the Jurassic time period?
Some dangerous dinosaurs that lived during the Jurassic period include Allosaurus, a large predatory theropod dinosaur, as well as Ceratosaurus, Dilophosaurus, and Torvosaurus. These dinosaurs were apex predators and hunted other animals for food.
When did the dinosaurs became extingt?
Dinosaurs became extinct around 65 million years ago during the Cretaceous-Paleogene extinction event. It is believed that a combination of climate change, asteroid impact, and volcanic activity contributed to their extinction.
Where there any meteors during the Jurassic era?
Yes, there is evidence that suggests meteors did hit the Earth during the Jurassic era. Some scientists believe that a meteor impact may have contributed to the mass extinction event that marked the end of the Jurassic period.
